Molding form



Patented May 8, 1923.

MOLDING FORM.

Application led `July' 20, 1922. SeralrNo. 576,373.

T o all whom it may concern?,

Beit known that I, HENRY RUs'rAD, of the city of Winnipeg, in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Molding Forms, of which the following is the specification.

The invention relates to improvements in molding forms and an object of the invention is to provide a -withdrawable form for molding air spaces in cement or such like self setting walls, a length vof wall being preferably cast as a unit and the forms inserted therein and withdiyawn prior to the wall setting. y

A further object of the invention is to provide a form which can be quickly and easily expanded or contracted and which is constructed comparatively light, although amply strong to withstand the heavy work for which it is designed.

A further object is to construct the device from Yrelatively few parts and with the various parts connected one to the other so that the form remains intact as a unit structure at al1 times.

.A further object is to construct the device so that when withdrawn it will leave a smooth faced opening in the wall.

With the above more important objects in view the invention consists essentially in the arrangement and construction of parts hereinafter. more particularly described and later pointed out in the appended claims, reference being had to the accompanying drawing in which: j

Fig. 1 is a plan view of a. portion of a vcast cement wall and showing a number of air spaces cast therein and my molding form as it appears in use and prior to withdrawal. Fig. 2 is a side view o-f the molding form. Fig. 3 is an interior view of the molding form, the movable side plate having been dismounted.

Fig. 4 is an interior view. of the movab-le side plate.

Fig. 5 is an enlarged detailed verticalisectional view at 5 5 Fig. 2, the central part of the form having been broken away.

Fig. 6 is an enlarged detailed ,horizontalv sectional view at 6-6y Fig. 3, the section passing through the side of the form.

Fig. 7 is an enlarged'detailed vertical seotional view at 7-7`" Fig. 3 and looking to the right.

In .the ldrawing likev characters of Ireference indicate corresponding parts'in the several figures.

Erica.v

The body part of the formcomprises a.

stationaryl side 1, a movable or collapsible side 2 and similar withdrawable ends 3 and l. The sides are identically constructed, each comprising a comparatively heavy gauge substantially rectangular sheet metal A Y body plate 5 having reinforcing bars 6 and 7, inthe present instance of angle iron, permanently riveted to their upper and lower edgesand suitably spaced parallel stay bars j 8, 9, 10 and 11 passing from the top to the bottom thereof and riveted to the body plate j and to the bars 6 and 7. The stay bars are also in the present instance formed of angle iron.

The various bars'are located on the inner sides of the plates and it will be observed that the edges of the plate are projected beyond the ends of the bars 6 and 7 lto form angular end flanges or wings 12 and 13.

The stationary plate is provided withupper and lower horizontally disposed sets of equi-length swinging arms '111 fastened pivotally to the flanges of the stay bars by means of loose rivets or bolts 15. The free ends ofthe arms of eachset are connected by upper and lower parallel cross rods 16 and 17.

A pair of spaced parallel vertically disposed flat adjusting bars 18 and 19 are carried by the rods 16 and 17, the bars having theirupper ends turned a quarter turn and .projecting beyond the upper edges of the sides of the form. A cross bar 20 forming a adjusting bars by bolts 2l.

The swingingarms 14 are stopped in a position at right angles to the body plates by engagement with substantially L-shaped brackets 22 permanently riveted to the body plate adjoining the outer sidesyof the bars 8' The lowermost ends of the adjusting` bars Yhandle is connected to the upper endsof the y are turned a quarter turn and terminate in outwardly flanged ends 18 and 19 and the side 2 is attached to the bars at the lower end by bolts 23 passing through the end flanges 18 and 19 and through the lower bar 7 and it has the upper end thereof fastened to the adjusting bars by angle brackets 24 riveted to the upper bar' 6 and fastened by bolts 25 to thelbars-18fan`d 19.

By so bolting the plate 2 it is possible to remove it at any time to inspect the interior of the form.

From the arrangement hereinbeiore described it will be obvious thatby forcing the bars 18 and r19 inwardly and downwardly one causes the movable plate to take its outermost position, the outermost position being reached when the arms 111 have engaged the brackets 22. At this time the plate 2 is directly opposite the plate 1.

On the other hand, ir" one pulls the bars 18 and 19 upwardly they cause theside 2 to shift inwardly toward the side 1, this movement being stopped when the cross rods strike the flanges of the stay bars.

The ends 3 and a ot the formare identically constructed, being each 'formed :trom comparatively heavy gauge sheet metal strips, the strips being bent into the shape best shown in Fig. 6. The said ends, it will be observed, present a vertical web 26 and a curving molding tace 27 and they take a position between the flanges or wings 12 12 and 13 13 when assembled.

The web of each wing is pivotally connected to the inner tips ot the brackets 22 by pivotiarms 28. rllhe pivot arms 28 have a horizontal position when the molding'faces 27 of the ends 3 and 4 of the form are contacting withy the end wings.

v Looped handles29 and 30 are secured' permanently to the upper ends of the webs so that one can manipulate the ends 3'and t by pullingupwardly or shovingdownwardly von vthe handles. A handle Slis also secured to the bar 6 of the stationary side 1 of the y vlong when the sides are 'fully expanded.

Then by spacing the 'forms two Vinches apart I provide in the cast wall equi-spaced webs 36 two inches wide and located at thirty two inch centres which is, according to practice, the usual spacing for floor joists, indicated at 37. y

By this arrangement the joists have their ends carried by the webs 36, which are in reality vertical columns in the wall, carrying the joists.

r1`he molding forms are set in proper position prior to the cement being poured and they are expanded fully by forcing the handies 20, 29 and 30 downwardly.

'1t is desirable to wrap a sheet of building paper or such like `raroundL each expanded form. When the forms have been properly positioned the cement is poured and prior to the same setting` one releases the forms by 'pulling up on'the handles. As the handles 29 and 30 are pulled upwardly the ends go in. After the ends are sowithdrawn 'the handle 20 is pulled upwardly which swings in the'movable plate. When this is done the form can be' bodily lifted as a unit from'the wall, leaving the air space therein.

When casting walls in this'manner l" also find it convenient to insert nailing stripsBS inthe face of the wall, the 'strips being spaced a predetermined distance apartand having tapering sides so that they-'become anchored in the cast wall.

llVhat l claim as my invention is:

1. A molding form comprising afstationary plate having inwardly deflected end wings, a movable plate opposing and `complementary to the stationary plateandhaving the end .wings deflected toward, but spaced'irom, the wings ot the other plate, means connecting the plates -pivotally together whereby the 'movable plate can'be swung toward or passed away' from thestationary plate, and retractable end members engagea'ble with theinnersildes of the" wings and normally closingthe opening between the wings.

2,. In' a molding formfastationary plate having the end thereoffprovided with inwardly deflected wings, a "movable plate spaced from and'complementaryfto the stationary plate, said" movable plate having :deflected end 'wings'extending Vtowards the former wings, butspacedtherefrom, vers'wingable 'arms connecting 'I the plates, end v'members normally' en'gageable with the inner Jfaces of the wings andy closing' the lopening therebetween and vertically swingab'le pivot arms supporting the' end members from' the stationary plate. y

3. A'ymoldi'ngiform' comprising-fa suitably 'interioily reinforced Astationary i plate rhaving the ends thereofinwardly deflected to "provide end wings, a suitably 'reinforced movable plate complementary tolandffopposing the stationary plate,said`=movable plate having end wings extending towards but spaced from the wings ofA thestationary plate,y upper and vlower v's'etsof vertically swingable arms"pivotal`ly coi'ine'cted'ftoY the inner side of the stationary plate, crossrods connecting the' free ends of the -armstof the sets, vertically extendingfspacedadjusting bars mounted on the rods, a handle connecting the upper ends of the bars, means connecting the movable plate to the adjusting bars, similar endplates normally contacting with the inner faces of the wings and closing the openings therebetween, vertically swingable pivot arms pivotally connecting the end plates to the stationary plate and handles secured to the upper ends of the end plates.

4. A molding form comprising a suitably interiorly reinforced stationary plate having the ends thereof inwardly deflected to provide end wings, a suitable reinforced movable plate complementary to and opposing the stationary plate, said movable plate havin@ end wings extending towards, but spaced from the wings of the stationary plate, upper and lower sets of vertically swingable arms pivotally connected to the inner side of the stationary plate, cross rods connecting the free ends of the arms of the sets, vertically extending spaced adjusting bars mounted on the rods, a handle connectv ing the upper ends of the bars, means connecting the movable plate to the adjusting bars, similar end plates normally contacting with the inner faces of the wings and closing the openings therebetween, stop brackets permanently secured to the stationary plate and engageable with certain of the swinging arms and limiting the down swinging thereof, vertically swingable arms pivotally connecting the end plates to the stop brackets and handles permanently attached to the upper ends of the end plates.

5. A molding form comprising a pair of similar opposing spaced side plates, said plates having `their inner sides suitably reinforced and their ends deflected angularly inwardly to provide opposing spaced end wings, horizontally disposed upper and sets of arms, end plates normally engagedwith the inner facesof the end wings and closing the openings therebetween, vertically swingable bars connecting the latter arms to the stops, lifting handles secured to the upper ends of the end plates and means attaching the other of the plates tothe adjustinvbars. l June, 1922.

HENRY RUSTAD. ln the presence of GERALD S. Roxnncfnt,y E. L. ARTHUR.

lgned at Winnipeg, this 10th` day of i 

